I think the action scenes made this one my favorite. I really enjoyed it. The ending made me really sad, though, so I like to think the end never happened. :)

I like how they made us think for a moment at the end that Hiccup was going to die. It's actually quite reasonable to think that at first because they already killed Stoick and we knew that this was the last movie so (until the announcement of Homecoming) we didn't know of anything else that he was supposed to appear in.